# SDR YAAA20150428004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 2015
- Submitted: April 28, 2015
- Operation: Air carrier
- Aircraft: [N91060](https://openairdocs.org/aircraft/N91060), registered now
- Make and model: Cessna T207
- Registry model: [Cessna T207](https://openairdocs.org/model/cessna-t207) (OpenAirDocs)
- Aircraft serial: 20700047
- Aircraft time: 17,450 hours
- Engine: Cont IO520F
- Engine time: 5,471 hours
- Propeller: Hartzl PHCC3YF1
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder Head
- Part number: SA52006A1
- Part serial: 526G1414484
- Condition: Cracked
- Location: Nr 5
- Part time: 5,471 hours
- Component: Engine, Cont, IO520F
- Component part number: IO520F
- Stage of operation: IN
- How discovered: B
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YAAA20150428004

## Discrepancy

DURING 100 HR INSPECTION BORESCOPED ENG & FOUND NR 5 CYLINDER CRACKED FROM LOWER SPARK PLUG BOSS TOWARDS EXHAUST VLV SEAT.

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